KS3 Chemistry
Chemistry suited for KS3 Students
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188 questions
| 🇬🇧 | 🇬🇧 |
| What are three states of matter? | Solid, liquid and gas |
| How can pressure affect a change of state? | The higher the pressure on a substance, the higher the temperature required to change from a liquid to a gas. |
| Higher pressure keeps the particles __ so, this needs a __ to get them to change from liquid to gas. | Closer together |
| Higher pressure keeps the particles __ so, this needs a __ to get them to change from solid to liquid. | Closer together |
| What is happening to a solid when you are adding heat and its temperature doesn't change? | Its state is changing |
| What is happening to a liquid when you are adding heat and its temperature doesn’t change? | Its state is changing |
| What is happening to a liquid when you are taking away heat and its temperature doesn’t change? | Its state is changing |
| What is happening to a gas when you are taking away heat and its temperature doesn’t change? | Its state is changing |
| How do you change a gas to a liquid? | Remove heat |
| How do you change a liquid to a solid? | Remove heat |
| What is this formula? | Carbon |
| What formula is pictured? | Chlorine |
| Which formula is displayed? | Aluminum oxide |
| What formula is shown? | Carbon di oxide |
| What knowledge did Dalton not have at the time of creating his model? | That atoms are composed of protons, neutrons and electrons. |
| Which statement is true of an atom? | Once thought of as the smallest building blocks of matter. |
| Which statement is true of an element? | All parts of these substances must have the same number of protons. |
| Which statement is true of an compound? | Each of these has a name that is one or more words long. |
| What does this image show? | A mixture of compounds |
| Which arrangement does this image show? | A mixture of elements and compounds |
| Which words describe the following image? | A pure element |
| Describe the following image. | A mixture of elements |
| Choose the correct description for this image. | A pure compound |
| Is pure water a compound or a mixture? | A compound |
| Is salt a compound or a mixture? | A compound |
| Is paint a compound or a mixture? | A mixture |
| Is air a compound or a mixture? | A mixture |
| Is bleach a compound or a mixture? | A compound |
| Is steel a compound or a mixture? | A mixture |
| Is baking soda a compound or a mixture? | A compound |
| Is sugar a compound or a mixture? | A compound |
| Which situation illustrates the quickest example of diffusion? | Opening a packet of coffee and letting the smell out |
| Which situation illustrates the slowest example of diffusion? | Placing a stone on top of another stone |
| Which of the following is a method of separating a mixture through filtration? | Separating a solid and a liquid by passing a mixture through a series of smaller and smaller openings; the liquid will pass through the holes and the solid will not. |
| Which of the following is a method of separating a mixture through evaporation? | Heating a solution until it becomes a gas, leaving behind the previously dissolved solid. |
| Which of the following is a method of separating a mixture through distillation? | Heating a liquid until it becomes a gas, then trapping and cooling the gas, leaving behind a separate solid and liquid. |
| Which of the following is a method of separating a mixture through chromatography? | Placing a substance on filter paper, putting the paper in a solvent and watching to see how, and how quickly, the substance and solvent reacts. |
| Which statement is a fact about chemical reactions? | Chemical reactions result in a new arrangement of atoms. |
| Which action involves a chemical reaction? | Frying an egg |
| Choose the definition for a catalyst, in a chemical reaction. | A substance that speeds up the rate of a chemical reaction |
| What is the product from the reaction of zinc and an acid? | A salt and hydrogen |
| What is the product from the reaction of magnesium and an acid? | A salt and hydrogen |
| What is the product from the reaction of copper and an acid? | A salt and hydrogen |